QUESTION

[Santosh Baburao Mane]

 I am pharmacy student , we study about plants ,and use of plant as
sources of drugs

 So my question is," why plants are able to survive with out excretory
system that is  kidney or liver
like organs ???" They do not need detoxification ?? why metabolic products
are not able to give toxicity 
to plant and why they induced toxicity to animal cells only .
  plants cells having any mechanism  for detoxification or is it
natural???

So pl help me to finding out answer  of this 


pl mail me ans.

Thanks
Santosh 
San_dha at giaspna.vsnl.net.in